25404 has 24 divisors (see below), whose sum is σ = 62160. Its totient is φ = 8064.

The previous prime is 25391. The next prime is 25409. The reversal of 25404 is 40452.

It is a nialpdrome in base 13.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25404.

It is not an unprimeable number, because it can be changed into a prime (25409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 384.

It is an arithmetic number, because the mean of its divisors is an integer number (2590).

2²⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31080).

25404 is an abundant number, since it is smaller than the sum of its proper divisors (36756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25404 is a wasteful number, since it uses less digits than its factorization.

25404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 25404 is about 159.3863231272. The cubic root of 25404 is about 29.3968435688.

Adding to 25404 its reverse (40452), we get a palindrome (65856).

The spelling of 25404 in words is "twenty-five thousand, four hundred four".